Senior Drainage / Hydrology Engineer

Job Summary We are seeking a highly experienced Drainage / Hydrology Engineer to lead the planning, analysis, and design of surface and subsurface drainage systems for infrastructure and development projects. The role involves hydrological modeling, flood risk assessment, stormwater management design, and ensuring compliance with applicable standards and regulatory requirements. Candidate shall have proven experience delivering end-to-end drainage design solutions across urban, industrial, highway, airport, seaport, and railway projects. Key Responsibilities Hydrology & Hydraulic Analysis Perform hydrological studies including rainfall-runoff analysis, watershed modeling, and flood estimation. Conduct hydraulic analysis for open channels, culverts, stormwater networks, and river systems. Develop floodplain maps and assess flood risks using appropriate models. Drainage Design Design stormwater drainage systems including: Roadside drainage (gutters, ditches) Culverts and cross-drainage works Stormwater pipelines and retention/detention systems Ensure efficient stormwater management while minimizing flood risks and erosion. Modeling & Software Use Utilize industry-standard tools such as: HEC-HMS, HEC-RAS SWMM, MIKE FLOOD / MIKE URBAN Civil 3D, InfoWorks, or similar platforms Prepare model inputs, calibrate models, and interpret results for design optimization. Project Coordination Collaborate with civil, structural, environmental, and geotechnical teams. Provide technical guidance and mentorship to junior engineers. Coordinate with clients, consultants, and government authorities. Compliance & Standards Ensure all designs comply with applicable standards, codes, and guidelines (IRC, MoRTH, local municipal requirements, international standards, etc.). Prepare reports, technical specifications, and design documentation for approvals. Risk & Sustainability Conduct climate resilience and flood risk assessments. Implement sustainable drainage systems (SuDS) and low impact development (LID) solutions where applicable. Required Qualifications Education Bachelor’s Degree in Civil Engineering (mandatory) Master’s Degree in Hydrology / Water Resources Engineering (mandatory) Experience Minimum 10+ years of relevant experience Proven experience in: Highway or urban drainage projects Large infrastructure development Flood risk and hydrological assessments Technical Skills Strong knowledge of hydrology, hydraulics, and drainage engineering principles Proficiency in: HEC-RAS, HEC-HMS SWMM / MIKE / InfoWorks AutoCAD / Civil 3D Experience with GIS tools (ArcGIS/QGIS) preferred Postgraduate in Hydrology / Environmental Engineering (or equivalent) with 10+ years of proven experience delivering end-to-end drainage design solutions across urban, industrial, highway, airport, seaport, and railway projects. Demonstrated ability to independently plan, model, and optimize stormwater systems, from catchment analysis and concept stage through to detailed design and GFC deliverables. Strong command of hydrologic and hydraulic modelling tools (SWMM, HEC-RAS, HEC-HMS, SewerCAD/Storm CAD, Civil 3D, QGIS, TUFLOW, MIKE, HY-8), applied to solve complex drainage challenges. Soft Skills Strong analytical and problem-solving skills Excellent communication and report writing skills Leadership and team management capability Ability to manage multiple projects and meet deadlines Key Competencies Flood risk assessment and mitigation Watershed management Stormwater system optimization Sustainable drainage design Regulatory compliance and approvals Preferred Attributes Experience in international projects or multi-disciplinary teams Knowledge of climate change impact assessment Chartered Engineer / Professional Engineer (preferred) Education Bachelor’s Degree in Civil Engineering (mandatory) Master’s Degree in Hydrology / Water Resources Engineering (mandatory) We are committed to equal treatment of candidates and promote, as well as foster all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter !. Bring your unique contributions and help us shape the future. Assystem provides engineering, project management and digital services to optimise the performance and safety of critical infrastructure throughout its lifecycle. The company first came to India having acquired Stup Consultants Pvt Ltd in 2021 and L&TIEL in 2024. The company combines its globally recognised expertise in complex project management, with deep-rooted local experience cross full spectrum of infrastructure – from energy, transportation and urban development to water. Today, Assystem has a strong community of 1,500+ multidiscipline engineering experts connected across 8 offices in India. The Assystem Group is one of the world’s leading independent nuclear engineering companies, ranked among the top three globally, with 60 years of experience in complex and highly regulated environments. With 8,000 experts across 13 countries, Assystem supports the development of low-carbon energy. For company profile, please visit the website :-